"We have a duty to secure a fair market place in West Yorkshire by ensuring traders operate legally and fairly.

"The sale of counterfeit goods undermines the local economy, costing jobs and misleading consumers."

Clr Tony Brice, a Kirklees councillor and member of the Trading Standards Committee, said: "Along with the other agencies involved in the operation we are determined to do what we can to tackle the illegal sale of this type of material.

"Music piracy costs the entertainment industry a fortune and the amount of goods that were seized on Sunday is quite staggering."

Staff from the Department for Work and Pensions discovered a number of individuals trading, who were also claiming benefits.

A Department for Work and Pensions spokesman said: "Benefit fraud is a very serious offence. Every man, woman and child loses when benefit is claimed fraudulently.

"The Department for Work and Pensions specialist team of investigators worked alongside the trading standards service to identify six benefit fraudsters and will continue to work with organisations to combat this type of crime."